CN111014684A - Rare earth element-containing copper infiltration agent and preparation method thereof - Google Patents
Rare earth element-containing copper infiltration agent and preparation method thereof Download PDFInfo
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- CN111014684A CN111014684A CN201811176216.8A CN201811176216A CN111014684A CN 111014684 A CN111014684 A CN 111014684A CN 201811176216 A CN201811176216 A CN 201811176216A CN 111014684 A CN111014684 A CN 111014684A
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- diffusion
- rare earth
- earth element
- infiltration agent
- ceramic balls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C12/00—Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces
- C23C12/02—Diffusion in one step
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
- B22F2003/242—Coating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a rare earth element-containing copper infiltration agent and a preparation method thereof, belonging to the technical field of powder metallurgy. The copper infiltration agent comprises the following components in percentage by mass: 2 to 10 percent of S, 1 to 2 percent of Re and the balance of copper. The preparation method comprises the steps of weighing the raw materials according to the proportion, adding the ceramic balls or the stainless steel balls and the diffusion accelerant, mixing, feeding the powder into a hydrogen reduction furnace for diffusion at the diffusion temperature of 300-1000 ℃ for 0.5-25 h, cooling, discharging, crushing, screening and collecting, and then adding the lubricant for batching. The copper infiltration agent prepared by the invention has the characteristics of good formability, high infiltration efficiency, no corrosion, low residue and capability of obviously improving the density and mechanical property of the material. The method has simple process, and the required equipment is easy to operate and can be used for mass production.
Description
Technical Field
The invention relates to the field of metallurgical materials, in particular to a rare earth element-containing copper infiltration agent and a preparation method thereof.
Background
At present, sintered steel parts for powder metallurgy are increasingly widely applied in industrial production, particularly in the automobile machinery industry due to the characteristics of low cost and easy processing, and the parts are commonly used sintered steel gears, cams, valve seats, exhaust valve seats and the like, and when the parts are in service in certain severe environments, the parts are required to have good wear resistance and impact resistance, and also are required to maintain higher strength and hardness. However, powder metallurgy sintered steel parts manufactured by the conventional pressing-sintering process cannot reach a completely compact state in the pressing process, and the residual pores affect the properties of tensile strength, impact toughness, fatigue strength, hardness and the like of the parts as a defect, so that the parts cannot meet the use requirements. Therefore, eliminating or reducing the residual porosity is the most effective way to obtain high density, high performance sintered steel, and copper infiltration is a common method. Research shows that when copper or copper alloy powder is used for infiltration of sintered steel, the pores in the sintered steel can be obviously reduced or eliminated, the density is increased, and the mechanical property and the dynamic property (such as impact toughness and fatigue) are improved. Compared with the traditional densification process such as re-pressing and re-sintering, powder forging, warm pressing and the like, the copper infiltration method has the advantages of low cost, simple process, easy adjustment and the like, so that the method has increasingly expanded application range since the method is published in the United states in the fortieth century, and is an indispensable densification process for producing high-performance iron-based powder metallurgy parts at present. However, copper and its alloys have a high cost and a short life, which limits their applications.
Therefore, it is necessary to develop a copper infiltration agent capable of improving the product yield and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a rare earth element-containing copper infiltration agent which comprises the following components in percentage by mass: 2 to 10 percent of S, 1 to 2 percent of Re and the balance of copper.
Another object of the present invention is to provide a method for preparing a rare earth element-containing copper infiltration agent, which comprises the following steps:
(1) weighing the raw materials according to the proportion, adding ceramic balls or stainless steel balls according to the ball material mass ratio of 1: 5-20, adding a diffusion promoter accounting for 0.1-1% of the total mass of the raw materials according to the weight percentage, and mixing for 0.5-2 hours in a mixer;
(2) after the material mixing process is finished, feeding the powder into a hydrogen reduction furnace for diffusion, wherein the diffusion temperature is 300-1000 ℃, and the diffusion time is 0.5-25 h;
(3) cooling, discharging, crushing, screening and collecting, and then adding a lubricant accounting for 0-1.5% of the total mass of the raw materials according to weight percentage for batching.
Preferably, the ceramic balls comprise alumina ceramic balls and zirconia ceramic balls.
Preferably, the diffusion promoter comprises one or more of NH4Cl, ZnCl2, NH4I and ZnI 2.
Preferably, the lubricant comprises zinc stearate, lithium stearate or microwax.
The invention has the beneficial effects that: through the treatment, a 0.2-0.8 mm sulfurizing layer can be formed on the surface of the copper or copper alloy part, and the wear resistance of the copper or copper alloy part can be improved.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The rare earth element-containing copper infiltration agent comprises the following components in percentage by mass: 2% S, 1% Re and the balance Cu.
A method for preparing a rare earth element-containing copper infiltration agent comprises the following steps:
(1) weighing CuS: 97kg, S powder: 2kg, Re: 1kg, adding 5kg of alumina ceramic balls according to the ball-material ratio of 1: 20, adding 0.2kg of NH4Cl as a diffusion promoter, and mixing for 1 hour in a mixer;
(2) after the material mixing process is finished, feeding the powder into a hydrogen reduction furnace for diffusion, wherein the diffusion temperature is 800 ℃, and the diffusion time is 90 min;
(3) cooling with circulating water, crushing, sieving with 100 mesh sieve, collecting, adding 0.5kg zinc stearate, and mixing to obtain the final product.
Example 2
The rare earth element-containing copper infiltration agent comprises the following components in percentage by mass: 10% S, 2% Re and the balance Cu.
A method for preparing a rare earth element-containing copper infiltration agent comprises the following steps:
(1) weighing electrolytic Cu powder: 88kg, S powder: 10kg, Re: 2kg, adding 5kg of zirconia ceramic balls according to the ball-material ratio of 1: 20, adding 0.15kg of ZnCl2 as a diffusion promoter, and mixing for 1.5h in a mixer;
(2) after the material mixing process is finished, feeding the powder into a hydrogen reduction furnace for diffusion, wherein the diffusion temperature is 600 ℃, and the diffusion time is 120 min;
(3) cooling by circulating water, discharging and crushing, screening and collecting by a 100-mesh sieve, and then adding 0.4kg of lithium stearate for mixing to prepare the copper-infiltrated agent.
Example 3
The rare earth element-containing copper infiltration agent comprises the following components in percentage by mass: 8% S, 1.3% Re and the balance Cu.
A method for preparing a rare earth element-containing copper infiltration agent comprises the following steps:
(1) weighing atomized copper powder: 91.7kg, S powder: 8kg, Re: 1.3kg, adding 5kg of stainless steel balls and 0.25kg of NH4I as a diffusion promoter according to the ball-material ratio of 1: 20, and mixing for 2 hours in a mixer;
(2) after the material mixing process is finished, feeding the powder into a hydrogen reduction furnace for diffusion, wherein the diffusion temperature is 850 ℃, and the diffusion time is 100 min;
(3) cooling with circulating water, crushing after discharging, collecting by 100-mesh sieve, adding 0.3kg of micro wax powder, and batching to prepare the copper-infiltrated agent.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit of the invention, and the scope of the appended claims is to be accorded the full range of equivalents.
Claims (5)
1. The rare earth element-containing copper infiltration agent is characterized by comprising the following components in percentage by mass: 2 to 10 percent of S, 1 to 2 percent of Re and the balance of copper.
2. A method for producing a rare earth element-containing copperizing agent according to claim 1, which comprises the steps of:
(1) weighing the raw materials according to the proportion, adding ceramic balls or stainless steel balls according to the ball material mass ratio of 1: 5-20, adding a diffusion promoter accounting for 0.1-1% of the total mass of the raw materials according to the weight percentage, and mixing for 0.5-2 hours in a mixer;
(2) after the material mixing process is finished, feeding the powder into a hydrogen reduction furnace for diffusion, wherein the diffusion temperature is 300-1000 ℃, and the diffusion time is 0.5-25 h;
(3) cooling, discharging, crushing, screening and collecting, and then adding a lubricant accounting for 0-1.5% of the total mass of the raw materials according to weight percentage for batching.
3. The method according to claim 2, wherein the ceramic balls comprise alumina ceramic balls and zirconia ceramic balls.
4. The method for preparing the rare earth element-containing copper infiltration agent according to claim 2, characterized in that the diffusion promoter comprises one or more of NH4Cl, ZnCl2, NH4I and ZnI 2.
5. The method of claim 2, wherein the lubricant comprises zinc stearate, lithium stearate or micro wax powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176216.8A CN111014684A (en) | 2018-10-10 | 2018-10-10 | Rare earth element-containing copper infiltration agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176216.8A CN111014684A (en) | 2018-10-10 | 2018-10-10 | Rare earth element-containing copper infiltration agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111014684A true CN111014684A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811176216.8A Pending CN111014684A (en) | 2018-10-10 | 2018-10-10 | Rare earth element-containing copper infiltration agent and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111014684A (en) |
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2018
- 2018-10-10 CN CN201811176216.8A patent/CN111014684A/en active Pending
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Application publication date: 20200417 |
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| WD01 | Invention patent application deemed withdrawn after publication |